Electric sad-iron.



A. H. HAPPE.

ELECTRIC SAD IRON.

APPLICATION FILED JUNE 30, 1910.

Patented Dec. 20, 1910.

3 SHEETS-SHEET 1.

A. H. HAPPE.

ELECTRIC SAD IRON- APPLICATION IILED JUNE 30, 1910.

Patented Dec. 20, 1910 3 BHEETS-BHEET 2.

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WITNESSES.

A. H. HAPPE.

ELECTRIC SAD IRON. APPLICATION FILED JUNE 30, 1910.

3 SHEETS-BHEET 3.

I-N'VENTDR Patented Dec. 20, 1910.

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2 m I 9 n W w l a pair of heating units showing the relative- UNITED STATES PATENT OFFICE.

ARTHUR H. HAPPE, 015 DETROIT, MICHIGAN, ASSIGNOR OF oNE HALF TO SAMUEL G. MUMFORD, 0F DETROIT, MICHIGAN.

ELECTRIC SAD-IRON.

Specification of Letters Patent. Patented Dec, 20, 1910 Application filed June 30, 1910. Serial No. 569,717.

To all whom it may concern:

Be it known that I, ARTHUR H. HAPIE, who am a citizen of the United States, re-

siding at Detroit, county of Wayne, State,

of Michigan, have invented a certain new and useful Improvement in Electric Sad- Irons, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to electrically heated sad irons, and has for its object an improved device of this type adapted to be heated through the medium of individually removable heating units,-which, when suitably connected up in series, form a sufficient resistance element to generate the degree of heat required forheating the polishing surface of the iron.

In the drawings:-Figure 1, is a perspective of the entire iron with the top casing member lifted from the bottom or polishing plate, and with portions of the latter broken away to show the various laminations. Fig. 2, is a plan of the polishing plate and the removable heating units. Fig. 3, is a View from beneath of the under surface of the top or casing member of the iron. Fig. 4, is a side elevation of the polishing plate, and the heating elements located thereon. Fig; 5, is a broken away plan view of a pair of adjacent heating elements. Fig. 6, is a similar View of a modified form of element. pair of heating units illustrating, in somewhatiexaggerated proportion and spacing, the contact of their adjacent terminals. Fig. 8 is a side elevation of the adjacent ends of position of the contacting resistanceelemont ends; the raising of the top sheet of mica at its end is exaggerated in degree.

The top casing A of the iron is adapted ,to be attached to the bottomor polishing plate B through the medium of the bolt C which engages in the threaded socket D which rises funnel-like from the upper surface of the plate 13. The shoulders E, which fit in corresponding recessed portions F in the under face of the casing member, insure the accurate fit of the two parts when they Fig. 7, is a perspective of a preferably of mica, which effectively insu late the strands of the resistance element.

from the adjacent parts of the iron. The end portions of these units G are preferably cut away as at L so as to engage about the shoulders E in the upper surface of the polishing plate, and thus be held inplace against lateral displacement. The projecting ends M and N of the several units G project from the protecting mica sheets to such an extent and in -such position as to he placed in contact with one another when the various units are assembled, and the ends of the rearward units are in position to be engaged by the resilient clip members P, which depend against them from the top portion A of the casing, through whose outer shell their continuations extend to suitable binding posts or clips 0, to which the terminalof the current cord can easily be attached. By arranging the units near the edge of the polishing plate, I secure the loca tion of the greatest heat at the edge of the iron and at its forward point, which is highly desirable, inasmuch as the center is most easily heated even under these conditions, because it receives heat from both sides, whereas, the heating of the edges is by far the most desired part. The under shell or ceiling T of the casing member A lies so closely adjacent to the upper surface of the polishing plate B when the parts are fully assembled that it bears strongly upon the upper surface of the several heating elements,-thereby insuring the contact of the exposed terminals of the several parts.

In Fig. 6 is shown a'slightly modified form of resistance element in which the element TV is stamped from a single sheet of metal, the space between its individual lengths V being cutaway to such an ex-- tent as to merely leave a sinuous metal path along which the current can travel. In this lot type there is no central core member H, but there are the usual mica inclosing plate K and the cut-away portions L. Both devices, however, are equally adapted to the arrangement shown in Fig. 2 wherein two units are caused to overlap at the forward point, thus providing a maximum heat at that point it is most desired. Either type of unit is capable of independent removal and renewal without disturbing the adjacent units to any appreciable degree, thus a package or supply of these units can be furnished to each purchaser of the iron and he saved the trouble and expense of subjecting the device as a whole to expert repair when any one of the units burns out.

\Vhat I claim is l. in an electric sad iron, in combination with a bottom-plate provided with a plin rality of upwardly extending shoulder members near the periphery thereof, a top casing piece adapted to lit thereover, a series of independently removable heating units interposed between said bottom plate and top casing piece, and in "engagement with said shoulder members, whereby they are held in place on said bottom plate, each unit comprising a pair of inclosing insulating plates, a central non-conducting core, and a resistance element wound thereabout with its ends projecting outside said insulating plates for contact with the corresponding parts of adjacent units, and a pair of terminal parts in- .sulated at their outer ends extending through the walls of said easing into contact with the exposed ends of the resistance elements of the end units of the series, substantially as described.

In an electric sad iron, in combination with a bottom plate provided with upwardly 3. In an electric sad iron, the combination ot a separable casing and polishing plate member having anchorage shoulders projecting from the upper face of the polishing plate portion and corres mndingly recessed parts in the under surl'ace ot' the casing, a pair oi' contact clips insulated at their outer ends engaging through the wall of the easing, and a series of independently removable lu-ating units arranged in electrical eontact with one another and against said anchorage shoulders, and with their end mem-' bers in contact with said clips on the peripheral portion of the top surtace ol the polishing plate memluazeach element comprising a pair of external insulating plates, a central core member, and a resistance element wound thereaboot and protected except as to its projecting ends by said insulating plates. substantially as described.

In testimony \.'hereol", I sign this specification in the presenceof two witnesses.

ARTHUR H. HAPPE. Witnesses:

SAMUEL C. Mnzuronn, \VJLLIAM M. Swan. 

